大般涅槃經義記 3.20

3.20

問曰：下說「滅無常色獲得常色，受、想、行、識亦復如是。」云何說言佛無受樂？釋言：受中有其二種：一受境界違順等事、二證法相應攝受正法故名為受。今言無者，無其初受；下言得者，得其後受，兩言不違。後二可知。從上唯願重垂廣來。

Question: Below it is stated, "Having eliminated impermanent form, one attains permanent form; feeling, perception, formations, and consciousness are also like this." Why is it said that the Buddha is without the pleasure of feeling? Explanation: Among feelings there are two kinds: first, feeling objects of sensory realms, whether adverse or agreeable; second, realizing the Dharma and concordantly taking in the true Dharma, which is therefore called "feeling." Now, when it is said to be "without," it is without the former feeling; below, when it is said to "attain," one attains the latter feeling, so the two statements do not conflict. The latter two are understandable. [This completes the section] from "We only pray that you will again condescend to explain broadly" above.